Coffee filter



FIG. 1 is a front view of a coffee filter showing my new design;

FIG. 2 is a rear view of the coffee filter;

FIG. 3 is a right side view of the coffee filter;

FIG. 4 is a left side view of the coffee filter;

FIG. 5 is a top view of the coffee filter;

FIG. 6 is a bottom view of the coffee filter; and,

FIG. 7 is a top front side perspective view of the coffee filter.

CLAIM The ornamental design for a coffee filter, as shown and described.